Magnetic field is the result of electric charge in motion (current). Which option best captures this concept?

Magnetic field is the result of electric charge in motion (current). Which option best captures this concept?

• A. The region around a static charge
• B. The region of space surrounding electric charge
• C. The result of electric charge in motion
• D. The energy stored in a capacitor

Answer: (C)

Magnetic fields arise from moving electric charges. When charges flow, they constitute a current that produces a magnetic field that encircles the path of the current. This is why a current-carrying wire has a circular magnetic field around it, and the direction of the field is given by the right-hand rule. A stationary charge creates an electric field, not a magnetic one, so simply having charge is not enough to generate magnetism. The energy stored in a capacitor, on the other hand, is stored in the electric field between its plates, not in a magnetic field. So the statement that magnetic field is the result of electric charge in motion best captures the concept.

Magnetic fields arise from moving electric charges. When charges flow, they constitute a current that produces a magnetic field that encircles the path of the current. This is why a current-carrying wire has a circular magnetic field around it, and the direction of the field is given by the right-hand rule.

A stationary charge creates an electric field, not a magnetic one, so simply having charge is not enough to generate magnetism. The energy stored in a capacitor, on the other hand, is stored in the electric field between its plates, not in a magnetic field.

So the statement that magnetic field is the result of electric charge in motion best captures the concept.